|This article is about Standard O₂ Tank in Subnautica. For the related article on the Below Zero Wiki, see Standard_O₂_Tank.|
|This article is about the Standard O2 Tank. If this is not what you are looking for, see Oxygen Tank (Disambiguation).|
The player must equip the Standard O2 Tank in the tank slot of the Paperdoll UI in order to benefit from it. While not equipped, it takes up six slots (2×3) in the inventory.
Equipping the O2 Tank will incur small swimming speed penalty. For more information, see: Swimming Speed.
Note that when an O2 tank of any kind is built, it defaults to being empty: it must be equipped in an atmosphere in order to fill it. This is important if the player intends to carry multiple tanks for deep diving without a vehicle.